Chicken makefiles tweaks for consistency with other languages - still more to be done though

Examples/chicken/constants/Makefile

@@ -13,7 +13,10 @@ VARIANT     =
 #CHICKEN_MAIN = test-constants.scm
 #VARIANT      = _static
 
-all:: $(TARGET)
+check: build
+	csi test-constants.scm
+
+build: $(TARGET)
 
 $(TARGET): $(INTERFACE) $(SRCS)
 	$(MAKE) -f $(TOP)/Makefile \
@@ -21,10 +24,7 @@ $(TARGET): $(INTERFACE) $(SRCS)
 		INCLUDE='$(INCLUDE)' SWIGOPT='$(SWIGOPT)' TARGET='$(TARGET)' \
 		SWIG='$(SWIG)' INTERFACE='$(INTERFACE)' CHICKENOPTS='$(CHICKENOPTS)' chicken$(VARIANT)
 
-clean::
+clean:
 	$(MAKE) -f $(TOP)/Makefile chicken_clean
 	rm -f example.scm
 	rm -f $(TARGET)
-
-check::
-	csi test-constants.scm